I don't think you would continue at this job if that were the case, and others wouldn't either, and the business would die.
You can set your own price by having skills that are in demand
Discussion
This is a good thought experiment, I really feel like lots of people (with little to no skills) would starve at first. But this would probably encourage people to learn more skills and not be a complete NPC their whole life. Also while we’re at it abolish any form of income tax please